William Atwood (1770 to 1835) buried in Fairfield, Ohio

I would appreciate help teasing out the families of three people and their back grounds:

William Atwood (1770 to 1835), buried in Basil Cemetery, Baltimore Twp, Fairfield County, Ohio with possible children of: James William, Margaret, Eli, John; and possibly also perhaps Abigail, Rachel, George Washington Atwood, and Thomas H. Atwood.

Widow Mary Atwood (abt 1801 to 1880) who married Joseph Wilcox as her and his second marriage, and had two children together, Benjamin Franklin Wilcox and William Henry Harrison Wilcox.

Abigail (Atwood? 1822 to 1911, died in Terre Heute, Indian, listed in Orbituary as born in Fairfield County, Ohio (but believe she grew up there), but in mos data including all she gives to census takers as being born in Virginia).She married William Harvey Wilcox abt 1840.

Joseph Wilcox is listed as a 'founding family' in Fairfield County, Ohio.Later son William H (Henry) Wilcox is listed in the Delaware County, Ohio as a founder in that county.

William Atwood lived in Fairfield County at the same time that Joseph Wilcox did.Suspect that later when William died, and Joseph's first wife (Mabel Carter) died, that Joseph Wilcox and widow of William (??? widow Mary Atwood, who did mary Joseph Wilcox) got together and married as possibly two of their children did also (William Harvey Wilcox and Abigail).

Can anyone help with the family and background of William Atwood who died in Fairfield County, Ohio in 1835?

Also the parents of Abigail Wilcox who died in 1911 in Terre Heute, Indiana, but married in Licking Ohio, but likely grew up in Fairfield County, Ohio; but was born in Virgina as were her parents??

And can anyone clarify for sure the first husband's name of widow Mary Atwood?